Why do I get Subscript indices must either be real positive integers or logicals?

This is my code, I keep getting this error in the first line.

%%% TDMA

T(1:n,0) = Tinf; aux(1:n,p) = T(:,p-1)

p=1;

Thanks!

[Matt Kindig]

You are trying to access column p-1 of matrix T. Since p=1, p-1=0. Matlab does not recognize an index of zero; Matlab indexing starts at 1.

[Giulia]

Thank you very much. I have another problem. I'll post it here, I hope you can help me:

Attempted to access Q(6); index out of bounds because numel(Q)=1.

Error in ProgramaGiuliaL (line 76) T(i,p) = Q(i)+P(i)*T(i+1,p-1);

Answer 1

[Matt J]

You are using zero as an index in

T(1:n,0) = Tinf.

Zero is not a positive integer.

[Giulia]

Thank you very much. I have another problem. I'll post it here, I hope you can help me:

Attempted to access Q(6); index out of bounds because numel(Q)=1.

Error in ProgramaGiuliaL (line 76) T(i,p) = Q(i)+P(i)*T(i+1,p-1);